<!DOCTYPE html>
<html lang="en">
  <head>
    <meta charset="UTF-8" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <title>Document</title>
  </head>
  <body>
    <script>
      // 创建FormData 实例
      let fd = new FormData();
      // 调用append 函数 向fd中追加数据
      fd.append("unmae", "zs");
      fd.append("upwd", "123");
      // 创建 xhr 实例
      let xhr = new XMLHttpRequest();
      xhr.open("POST", "http://www.liulongbin.top:3006/api/formdata");
      xhr.send(fd);
      xhr.onreadystatechange = function () {
        if (xhr.readyState === 4 && xhr.status === 200) {
          console.log(JSON.parse(xhr.responseText));
        }
      };
    </script>
  </body>
</html>
